Results in Engineering,
Journal Year:
2024,
Volume and Issue:
21, P. 101792 - 101792
Published: Jan. 15, 2024
The
present
investigation
aims
to
shed
light
on
the
efficiency
of
irradiation-based
advanced
oxidation
processes
using
controlled
pulsed
illumination
(CPI)
in
a
homogeneous
process.
A
more
in-depth
emphasis
has
been
applied
considering
ultraviolet-light
emitting
diodes/persulfate
(LED/S2O82−)
system.
Irradiation-driven
can
unexpected
behaviour
under
irradiation
compered
continuous
irradiation.
This
be
explained
by
Parrando's
paradox
concept.
removal
organic
dyes
source
was
compared
CPI
system
employing
UV-LED/S2O82−
photoreactor
explore
performance.
UV-LED/PS
method
investigated
three
as
model
pollutants
and
duty
cycle
pulse
period
parameters
source.
have
crucial
impact
efficiencies,
which
were
studied
values
10
%,
25
50
75
90
99
%
for
periods
from
1
ms
(ms)
few
hundred
current
study.
For
all
experiments,
electrical
energy
consumption
(EEO)
calculated,
values.
According
results,
cycles
(10
800
ms),
with
EEO
amounts
58.29,
120.65,
29.62
kWh
per
order
showed
best
performance
dyes,
respect
other
experiments
terms
saving
energy.
Besides,
game
theory
collision
hypothesis
scrutinized
justify
achieved
results.
Desalination and Water Treatment,
Journal Year:
2024,
Volume and Issue:
318, P. 100384 - 100384
Published: April 1, 2024
Advanced
oxidation
processes
(AOPs)
have
become
increasingly
more
useful
and
necessary
in
the
past
few
decades
because
they
can
degrade
a
wide
range
of
organic
inorganic
contaminants.
The
toxic
recalcitrant
nature
many
contaminants
obstruct
traditional
biological
processes,
making
treatment
ineffective.
Therefore,
there
is
pressing
need
to
develop
apply
effective
for
industrial
wastewater,
polluted
by
pharmaceuticals,
dyes,
other
industries.
AOPs
successful
technologies
treating
wastewater
remove
contaminants,
reduce
toxicity,
improve
biodegradability,
including
using
ultraviolet
(UV)
visible
light
(VIS)
combined
with
homogenous
or
heterogeneous
catalysts.
This
review
shows
that
Fenton
process
semiconductor
material
greatly
facilitates
removing
various
pollutants.
Additionally,
photocatalysis
research
ongoing
this
method
effectively
removes
emerging
In
addition,
challenges,
needs,
future
uses
are
described
performance
hasten
large-scale
implementation
water
treatment.
Scientific Reports,
Journal Year:
2023,
Volume and Issue:
13(1)
Published: Nov. 29, 2023
Abstract
Adsorbents
synthesized
by
activation
and
nanoparticle
surface
modifications
are
expensive
might
pose
health
ecological
risks.
Therefore,
the
interest
in
raw
waste
biomass
materials
as
adsorbents
is
growing.
In
batch
studies,
an
inexpensive
effective
adsorbent
developed
from
olive
stone
(OS)
to
remove
methylene
blue
(MB)
aqueous
solution.
The
OS
characterized
using
scanning
electron
microscopy
(SEM),
Fourier
Transform
Infra-Red
(FTIR),
Brunauer–Emmett–Teller
(BET)
area.
Four
isotherms
used
fit
equilibrium
adsorption
data,
four
kinetic
models
simulate
behavior.
obtained
BET
area
0.9
m
2
g
−1
,
SEM
analysis
reveals
significant
pores
sample
that
facilitate
uptake
of
heavy
compounds.
Langmuir
Temkin
isotherm
best
represent
adsorbtion
MB
on
OS,
with
a
maximum
monolayer
capacity
44.5
mg
.
dye
color
removal
efficiency
93.65%
solution
20
ppm
at
doses
0.2
for
90
min
contact
time.
serves
five
successive
cycles
after
simple
filtration-washing-drying
process,
maintaining
91,
85,
80,
78%
2,
3,
4,
5,
respectively.
pseudo
second-order
model
process
dynamics.
Indeed,
Elovich
most
appropriate
models,
according
correlation
coefficient
(R
)
values
(1.0
0.935,
respectively)
derived
models.
parameters
also
predicted
based
mass
transfer
intra-particle
diffusion
Bangham
Burt.
According
thermodynamic
analysis,
endothermic
spontaneous.
As
result,
material
offers
efficient
wastewater
less
expensive,
more
ecologically
friendly,
economically
viable.
Desalination and Water Treatment,
Journal Year:
2024,
Volume and Issue:
317, P. 100033 - 100033
Published: Jan. 1, 2024
This
work
investigates
removing
the
anionic
azo
dye
from
wastewater
using
Fe3O4
magnetic
nanoparticle
adsorbents
in
a
batch
system.
The
effects
of
adsorbent
dosage
(0.1–0.5
g/L),
pH
(2−10),
concentration
(5–45
mg/L),
contact
duration
(0–140
min),
and
shaking
speed
(100–180
rpm)
on
removal
(adsorption)
efficiency
at
23
°C
were
investigated.
Besides
kinetic
isothermal
studies
applied
as
well
to
improve
commercial
adsorbents'
performance
dyes.
nanoparticles
achieve
maximum
99.99%
optimum
values
investigated
parameters:
3
g/L
dose,
5
mg/L
concentration,
2,
180
rpm
120
min
°C.
Langmuir
adsorption
isotherm
has
highest
correlation
coefficient
(R2
=
0.977)
compared
Freundlich,
Temkin
isotherms;
absorption
is
estimated
be
0.4158
mg/g.
equilibrium
parameter
(RL)
model
are
between
0
1,
indicating
isotherm's
favorability.
rates
follow
pseudo-first-order
kinetics,
with
R2
0.973.
Results in Engineering,
Journal Year:
2024,
Volume and Issue:
22, P. 102005 - 102005
Published: March 16, 2024
Using
biomass-based
catalysts
in
biodiesel
production
can
make
the
process
more
economical
and
environmentally
friendly.
In
this
study,
a
new
magnetic
nanocatalyst
was
developed
using
banana
peel
biochar,
ZIF-67,
Fe3O4,
K2CO3,
then
utilized
catalytic
transesterification
to
convert
waste
cooking
oils
(WCO)
into
biodiesel.
The
level
of
free
fatty
acids
treated
WCO
(WCOT)
reduced
generate
with
suitable
characteristics.
physicochemical
aspects
were
characterized
by
Fourier-transform
infrared
spectroscopy
(FTIR),
vibrating
sample
magnetometer
(VSM),
X-ray
diffraction
(XRD),
scanning
electron
microscopy
(SEM),
energy
dispersive
(EDX)
map
techniques.
process,
effect
temperature,
methanol-to-oil
ratio,
time,
weight
on
potential
produce
from
WCOT
explored.
highest
yield
(96.82%)
(99.18%)
attained
at
65
°C,
3
wt
%,
ratio
19:1,
processing
time
h,
mixing
rate
600
rpm.
Based
thermodynamic
studies,
endothermic
non-spontaneous.
regeneration
studied
various
solvents
n-hexane
had
good
ability
recover
catalyst
(90%
up
5
stages).
results
1H
NMR
test
revealed
that
desired
high
WCOT.
properties
produced
met
ASTM
D6751
EN
14214
standards.
Water Practice & Technology,
Journal Year:
2024,
Volume and Issue:
19(7), P. 2799 - 2815
Published: June 25, 2024
ABSTRACT
This
study
investigated
the
removal
of
a
typical
organic
pollutant
methylene
blue
(MB)
dye
from
wastewater
by
prepared
mesoporous
SBA-15
adsorbent
in
continuous
adsorption
system
(fixed-bed
column).
The
structural
and
textural
properties
were
determined
using
different
characterization
techniques.
experiments
assessed
bed
height
effect,
initial
concentration,
flow
rate
on
breakthrough
curve.
kinetic
constants
curves
obtained
Thomas
Yan
models.
results
revealed
that
has
an
excellent
efficiency
for
use
system.
findings
explain
MB
achieved
maximum
uptake
(84
mg/g)
at
6
cm
height,
0.5
mL/min
rate,
30
mg/L
concentration
MB.
can
be
efficiently
regenerated
calcination
re-employed
5
times
fixed-bed
without
significant
loss
its
capacity
solutions.
As
result,
was
as
appropriate
media
to
suggests
is
feasible
effectively
wastewater.
Energy Conversion and Management,
Journal Year:
2024,
Volume and Issue:
318, P. 118884 - 118884
Published: Aug. 8, 2024
The
escalating
global
energy
crisis
coupled
with
environmental
concerns
has
accelerated
the
pursuit
of
renewable
sources,
biodiesel
emerging
as
a
pivotal
alternative
to
fossil
fuels.
This
review
systematically
explores
advancements
in
production,
focusing
on
utilization
diverse
feedstocks
and
evolution
catalytic
technologies.
Initially
reliant
first-generation
feedstocks,
primarily
edible
oils,
production
shifted
towards
second
third-generation
sources
such
non-edible
plant
waste
algal
biomass
circumvent
food
vs.
fuel
dilemma
enhance
sustainability.
further
delves
into
methods,
highlighting
transition
from
homogeneous
heterogeneous
catalysts,
including
those
derived
bio-waste
innovative
nanoparticles,
which
offer
economic
benefits
by
enhancing
reaction
efficiencies
reducing
costs.
synthesis
via
these
advanced
catalysts
not
only
supports
sustainable
development
but
also
aligns
policies
aimed
at
carbon
footprints.
underscores
necessity
continuous
technological
supportive
foster
broader
adoption
ensure
its
role
landscape.
Results in Engineering,
Journal Year:
2023,
Volume and Issue:
20, P. 101507 - 101507
Published: Oct. 11, 2023
This
study
investigates
the
efficient
removal
of
ciprofloxacin
(Cip)
and
cephalexin
(Cep)
using
magnetic
graphene
oxide
(Fe3O4/GO)
as
an
adsorbent.
To
this
end,
nanocomposite
was
synthesized
via
a
co-precipitation
method.
The
surface
properties
adsorbent
were
characterized
pHpzc,
XRD,
FE-SEM,
FT-IR,
VSM,
TEM
techniques.
XRD
FT-IR
results
consistent
with
those
previous
results.
FE-SEM
nanoparticles
less
than
30
nm
in
size
showed
spherical
shape.
maximum
saturation
magnetization
Fe3O4/GO
45.97
emu
g−1.
Also,
pHpzc
6.2.
optimal
conditions
for
independent
variables
found
to
be
antibiotic
concentration
15
mg
L−1,
pH
7,
contact
time
33
min,
amount
0.55
g.
Furthermore,
under
these
conditions,
removed
96.39
%
Cip
97.69
Cep
from
water
samples.
Among
different
eluents
(i.e.,
acetonitrile,
chloroform,
methanol,
ammonia),
significant
desorption
antibiotics
achieved
methanol.
applying
on
real
samples
revealed
that
could
remove
range
89.96–95.83
%.
Considering
high
potential
removing
antibiotics,
it
can
considered
suitable
candidate
contaminated
sources.
